Improvement in shutter and blind fastener



UNITED STATES PATENT OEEIGE.

W. B. FARRAB, OF GREENSBOROUGH, NORTH CAROLINA.

IMPROVEMENT IN SHUTTER AND BLIND FASTENER.

Specification forming part of Letters Patent No. 84,81l, dated December8, 1868.

To all whom it may concern:

Be it known that I, W. B. FARRAR, of Greensborough, in the county.ofGuilford and State of North Carolina, have invented a new and ImprovedShutter and Blind Fastening; and I do hereby declare that the followingis a full, clear, and exact description of the construction andoperation of the same, reference being had to the accompanying drawings,making a part of this specification, in which- Figure l is an elevationof the fastening as seen from the inside of the house. Fig. 2 is avertical section through the line :r a: of Fig. 1.

This device relates to that class of 'locks or fastenings Which areapplied inside of a building to secure the bolt by which the shutterbaris confined; and consists in a lock so constructed and operating thatsuchbolt cannot be removed by a person outside of the building, While itcan be fastened at any time from the outside Without the necessity ofgoing Wi thin.

In the drawings, A :represents the Wall or easement of the building; B,the bolt by which the end of the bar that contines the shutters orblinds is fastened; and C, the plate attached to the inside of the Wallor easement, which supports the various parts of the lock. This bolt isformed With a nick or notch, b, around' rests against the end of a flatspring, G. The.

spring drops under the shoulder or knob, and thus holds the plate,keeping it out of the Way 'of the bolt B.

The end of the bolt projects so far inward that when the bolt is forcedin its end knocks the flat spring out from under the shoulder or knob,leaving the plate E to be drawn down by the spiral spring F and fastenthe bolt, as above described.

Vhen the plate E is slid up again by some person inside of the building,as the knob escapes from under the spring the latter, sprlngs downagainst the face of plate C with considerable force, driving the boltpartially or entirely out of the socket D, and assistingin unfasteningand opening the shutter or blmd.

The slide E is guided and held in place between pins m m m m, and isprovided with a notch, a, in one side, at its upper end, which dropsunder one of the pins m, and prevents the plate from being slid directlyup again, locking the. latter in position, and conning the bolt verysecurely.

The plate is caused to move in such a manner as invariably to bring thisnotch under the pin, the spring F drawing upon one corner ofthe plate,so as to force the latter side- Wise and insure its locking.

When any person desires to unlock the device, he must take hold of aknob, k, force the plate E to the left till the notch n is free from thepin fm, and then slide the plate np till the spring G drops from theboss e and forces the .bolt out.

To lock the device, on the other hand, 1t is only necessary to force thebolt through the` socket D, so as to knock the spring G from under theshoulder e, andleave the other sprln g,

F, free to operate the plate E, as above set forth.

It is evident that, While the apparatus can be readily and securelylocked from the outside, it can be unlocked only from the inside of thebuilding.

Having thus described my invention, what I claim 'as new, and desire tosecure by Letters Patent, is

l. The tumbler Fr, in combination with the W. B. FARRAR.

Witnesses A. P. ECKEL, S. H. STAPLES.

